This function retrieves the position of a node in a particular degree of freedom at a particular time step.
GetPosition (string DatabaseName, int TimeIndex, int NodeIndex, int DOFNo)
DatabaseName (character string). The full path name to the relevant database.
TimeIndex (integer). The relevant time index.
NodeIndex (integer). The relevant node index.
DOFNo (integer). The Degree of Freedom (1 to 6).
-9999998 (if the specified database is invalid)
-9999999 (if the requested value cannot be retrieved from the database)